How to calculate the heat of reaction between CO, CO2 and hydrogen?
Thread Content
:L :L :L How to calculate the heat of reaction between CO, CO2 and hydrogen? (Involving the methanol synthesis reactor) Or this directly tells me what are the heats of reaction of CO, CO2 and hydrogen? (condition: 5.0MPa, 240℃) Thank you! ! !
From the manual, we found the CO+H2=CH4+H2O standard reaction ΔH1, as well as the Cp values of CO, H2, CH4, H2O (gaseous), etc., and the steam ΔHvap of water in the standard state, Q=×(250-25). The influence of pressure changes on the reaction is negligible, so we can obtain ΔH=ΔH1+ΔHvap+Q. The reaction of co2 and H2 is obtained in a similar way.
The heat of reaction between CO and H2 to form methanol is: -The heat of reaction of 103129kj/kmol CO2 and H2 to produce methanol is: -111581kj/kmol
In fact, it is to check CO and CO2. The standard molar formation enthalpy of CH3OH is calculated, and then the standard molar reaction enthalpy of each reaction is calculated, and then converted into the enthalpy value at the temperature and pressure required by the poster.
I'm very surprised, why is the heat of CO2 here greater than that of CO? ?
Just read up on chemical thermodynamics. You don't have to do the calculations yourself. You can check the corresponding enthalpy values from the curve graph.